android - 如何在 android 的另一个 Activity 中使用任何其他布局的组件(setContentView() 中定义的除外)

Question

我正在开发一个应用程序，其中我需要在 ListView 中显示一些数据，因为我创建了一个连接到包含 listview 的布局的 Activity ，为此我创建了自定义列表项的 ListView 。现在我需要从 Activity 中的自定义列表项访问组件(Imageview)。谁能告诉我如何实现这一目标？

这是 Activity

package com.example.manishnegi.sharemyride;


public class RideMatched extends Activity {
int commentCount       = 0;
private List<GetRidesSummaryDetails> oslist = new ArrayList<GetRidesSummaryDetails>();
ListView rides_matchedListview;
ImageView hrate1,hrate2,hrate3,hrate4,hrate5;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.ride_matched);
    hrate1=(ImageView)findViewById(R.id.hrate1);
    hrate2=(ImageView)findViewById(R.id.hrate2);
    hrate3=(ImageView)findViewById(R.id.hrate3);
    hrate4=(ImageView)findViewById(R.id.hrate4);
    hrate5=(ImageView)findViewById(R.id.hrate5);
    int l=0;
   String arr;
    JSONArray array=new JSONArray();
    Bundle b=getIntent().getExtras();
    if(b!=null)
    {
     l=b.getInt("array_length");
        arr=b.getString("rides_array");
        try {
             array=new JSONArray(arr);
            Log.e("String to array ",array.toString());
        } catch (JSONException e) {
            e.printStackTrace();
            Log.e("String to array",e.getMessage());

        }

        Log.e("Number of matched",l+"");
    }
    rides_matchedListview = (ListView)findViewById(R.id.rides_matchedListview);
    Second scnd = new Second();
    List<GetRidesSummaryDetails> detailsofrides = scnd.getallcomments(l,array);
    for (GetRidesSummaryDetails values :detailsofrides){
        String driver_imageget = values.getDriverimage();
        String driver_nameget = values.getDrivername();
        String pickup_get = values.getPickuptime();
        String ride_idget= values.getRideId();
        String rating_get = values.getRating();
        String vehicle_imageget = values.getVehicleImage();

        GetRidesSummaryDetails vehi = new GetRidesSummaryDetails();
        vehi.setDriverimage(driver_imageget);
        vehi.setDrivername(driver_nameget);
        vehi.setPickuptime(pickup_get);
        vehi.setRideId(ride_idget);
        vehi.setRating(rating_get);
        setRating(Integer.parseInt(rating_get));
        vehi.setVehicleImage(vehicle_imageget);
        oslist.add(vehi);
        commentCount++;
        rides_matchedListview.setAdapter(new RidesMatchedAdapter(RideMatched.this, 0, oslist));
        new RidesMatchedAdapter(RideMatched.this ,0, oslist).notifyDataSetChanged();

    }
}

public void setRating(int rate)
{
    if (rate == 1) {
        hrate1.setImageResource(R.drawable.star);


    }

    if (rate == 2) {
        hrate1.setImageResource(R.drawable.star);
        hrate2.setImageResource(R.drawable.star);

    }

    if (rate == 3) {
        hrate1.setImageResource(R.drawable.star);
        hrate2.setImageResource(R.drawable.star);
        hrate3.setImageResource(R.drawable.star);

    }

    if (rate == 4) {
        hrate1.setImageResource(R.drawable.star);
        hrate2.setImageResource(R.drawable.star);
        hrate3.setImageResource(R.drawable.star);
        hrate4.setImageResource(R.drawable.star);

    }

    if (rate == 5) {
        hrate1.setImageResource(R.drawable.star);
        hrate2.setImageResource(R.drawable.star);
        hrate3.setImageResource(R.drawable.star);
        hrate4.setImageResource(R.drawable.star);
        hrate5.setImageResource(R.drawable.star);

    }

}
}

这是 ListView 布局(ride_matched.xml)

这是自定义列表项

Answer 1

您必须已经使用该适配器为 ListView 创建了适配器，并在 viewHolder 中声明了它应该工作的图像。